#ifndef _STRING_H_
#define _STRING_H_

#ifndef NULL
#define NULL ((void *) 0)
#endif

#ifndef _SIZE_T
#define _SIZE_T
typedef unsigned int size_t;
#endif

extern char * strerror(int errno);

/*
 * This string-include defines all string functions as inline
 * functions. Use gcc -march=i386 -m32 . It also assumes ds=es=data space, this should be
 * normal. Most of the string-functions are rather heavily hand-optimized,
 * see especially strtok,strstr,str[c]spn. They should work, but are not
 * very easy to understand. Everything is done entirely within the register
 * set, making the functions fast and clean. String instructions have been
 * used through-out, making for "slightly" unclear code :-)
 *
 *		(C) 1991 Linus Torvalds
 */
 
// extern inline char * strcpy(char * dest,const char *src)
// {
// __asm__("cld\n"
// 	"1:\tlodsb\n\t"
// 	"stosb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"jne 1b"
// 	::"S" (src),"D" (dest):"ax");
// return dest;
// }

// extern inline char * strncpy(char * dest,const char *src,int count)
// {
// __asm__("cld\n"
// 	"1:\tdecl %2\n\t"
// 	"js 2f\n\t"
// 	"lodsb\n\t"
// 	"stosb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"jne 1b\n\t"
// 	"rep\n\t"
// 	"stosb\n"
// 	"2:"
// 	::"S" (src),"D" (dest),"c" (count):"ax");
// return dest;
// }

// extern inline char * strcat(char * dest,const char * src)
// {
// __asm__("cld\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"decl %1\n"
// 	"1:\tlodsb\n\t"
// 	"stosb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"jne 1b"
// 	::"S" (src),"D" (dest),"a" (0),"c" (0xffffffff):);
// return dest;
// }

// extern inline char * strncat(char * dest,const char * src,int count)
// {
// __asm__("cld\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"decl %1\n\t"
// 	"movl %4,%3\n"
// 	"1:\tdecl %3\n\t"
// 	"js 2f\n\t"
// 	"lodsb\n\t"
// 	"stosb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"jne 1b\n"
// 	"2:\txorl %2,%2\n\t"
// 	"stosb"
// 	::"S" (src),"D" (dest),"a" (0),"c" (0xffffffff),"g" (count)
// 	:);
// return dest;
// }

// extern inline int strcmp(const char * cs,const char * ct)
// {
// register int __res __asm__("ax");
// __asm__("cld\n"
// 	"1:\tlodsb\n\t"
// 	"scasb\n\t"
// 	"jne 2f\n\t"
// 	"testb %%al,%%al\n\t"
// 	"jne 1b\n\t"
// 	"xorl %%eax,%%eax\n\t"
// 	"jmp 3f\n"
// 	"2:\tmovl $1,%%eax\n\t"
// 	"jl 3f\n\t"
// 	"negl %%eax\n"
// 	"3:"
// 	:"=a" (__res):"D" (cs),"S" (ct):);
// return __res;
// }

// extern inline int strncmp(const char * cs,const char * ct,int count)
// {
// register int __res __asm__("ax");
// __asm__("cld\n"
// 	"1:\tdecl %3\n\t"
// 	"js 2f\n\t"
// 	"lodsb\n\t"
// 	"scasb\n\t"
// 	"jne 3f\n\t"
// 	"testb %%al,%%al\n\t"
// 	"jne 1b\n"
// 	"2:\txorl %%eax,%%eax\n\t"
// 	"jmp 4f\n"
// 	"3:\tmovl $1,%%eax\n\t"
// 	"jl 4f\n\t"
// 	"negl %%eax\n"
// 	"4:"
// 	:"=a" (__res):"D" (cs),"S" (ct),"c" (count):);
// return __res;
// }

// extern inline char * strchr(const char * s,char c)
// {
// register char * __res __asm__("ax");
// __asm__("cld\n\t"
// 	"movb %%al,%%ah\n"
// 	"1:\tlodsb\n\t"
// 	"cmpb %%ah,%%al\n\t"
// 	"je 2f\n\t"
// 	"testb %%al,%%al\n\t"
// 	"jne 1b\n\t"
// 	"movl $1,%1\n"
// 	"2:\tmovl %1,%0\n\t"
// 	"decl %0"
// 	:"=a" (__res):"S" (s),"0" (c):);
// return __res;
// }

// extern inline char * strrchr(const char * s,char c)
// {
// register char * __res __asm__("dx");
// __asm__("cld\n\t"
// 	"movb %%al,%%ah\n"
// 	"1:\tlodsb\n\t"
// 	"cmpb %%ah,%%al\n\t"
// 	"jne 2f\n\t"
// 	"movl %%esi,%0\n\t"
// 	"decl %0\n"
// 	"2:\ttestb %%al,%%al\n\t"
// 	"jne 1b"
// 	:"=d" (__res):"0" (0),"S" (s),"a" (c):);
// return __res;
// }

// extern inline int strspn(const char * cs, const char * ct)
// {
// register char * __res __asm__("si");
// __asm__("cld\n\t"
// 	"movl %4,%%edi\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"notl %%ecx\n\t"
// 	"decl %%ecx\n\t"
// 	"movl %%ecx,%%edx\n"
// 	"1:\tlodsb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"je 2f\n\t"
// 	"movl %4,%%edi\n\t"
// 	"movl %%edx,%%ecx\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"je 1b\n"
// 	"2:\tdecl %0"
// 	:"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)
// 	:"dx","di");
// return __res-cs;
// }

// extern inline int strcspn(const char * cs, const char * ct)
// {
// register char * __res __asm__("si");
// __asm__("cld\n\t"
// 	"movl %4,%%edi\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"notl %%ecx\n\t"
// 	"decl %%ecx\n\t"
// 	"movl %%ecx,%%edx\n"
// 	"1:\tlodsb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"je 2f\n\t"
// 	"movl %4,%%edi\n\t"
// 	"movl %%edx,%%ecx\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"jne 1b\n"
// 	"2:\tdecl %0"
// 	:"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)
// 	:"dx","di");
// return __res-cs;
// }

// extern inline char * strpbrk(const char * cs,const char * ct)
// {
// register char * __res __asm__("si");
// __asm__("cld\n\t"
// 	"movl %4,%%edi\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"notl %%ecx\n\t"
// 	"decl %%ecx\n\t"
// 	"movl %%ecx,%%edx\n"
// 	"1:\tlodsb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"je 2f\n\t"
// 	"movl %4,%%edi\n\t"
// 	"movl %%edx,%%ecx\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"jne 1b\n\t"
// 	"decl %0\n\t"
// 	"jmp 3f\n"
// 	"2:\txorl %0,%0\n"
// 	"3:"
// 	:"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)
// 	:"dx","di");
// return __res;
// }

// extern inline char * strstr(const char * cs,const char * ct)
// {
// register char * __res __asm__("ax");
// __asm__("cld\n\t" 
// 	"movl %4,%%edi\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"notl %%ecx\n\t"
// 	"decl %%ecx\n\t"	/* NOTE! This also sets Z if searchstring='' */
// 	"movl %%ecx,%%edx\n"
// 	"1:\tmovl %4,%%edi\n\t"
// 	"movl %%esi,%%eax\n\t"
// 	"movl %%edx,%%ecx\n\t"
// 	"repe\n\t"
// 	"cmpsb\n\t"
// 	"je 2f\n\t"		/* also works for empty string, see above */
// 	"xchgl %%eax,%%esi\n\t"
// 	"incl %%esi\n\t"
// 	"cmpb $0,-1(%%eax)\n\t"
// 	"jne 1b\n\t"
// 	"xorl %%eax,%%eax\n\t"
// 	"2:"
// 	:"=a" (__res):"0" (0),"c" (0xffffffff),"S" (cs),"g" (ct)
// 	:"dx","di");
// return __res;
// }

// extern inline int strlen(const char * s)
// {
// register int __res __asm__("cx");
// __asm__("cld\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"notl %0\n\t"
// 	"decl %0"
// 	:"=c" (__res):"D" (s),"a" (0),"0" (0xffffffff):);
// return __res;
// }

// extern char * ___strtok;

// extern inline char * strtok(char * s,const char * ct)
// {
// register char * __res __asm__("si");
// __asm__("testl %1,%1\n\t"
// 	"jne 1f\n\t"
// 	"testl %0,%0\n\t"
// 	"je 8f\n\t"
// 	"movl %0,%1\n"
// 	"1:\txorl %0,%0\n\t"
// 	"movl $-1,%%ecx\n\t"
// 	"xorl %%eax,%%eax\n\t"
// 	"cld\n\t"
// 	"movl %4,%%edi\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"notl %%ecx\n\t"
// 	"decl %%ecx\n\t"
// 	"je 7f\n\t"			/* empty delimeter-string */
// 	"movl %%ecx,%%edx\n"
// 	"2:\tlodsb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"je 7f\n\t"
// 	"movl %4,%%edi\n\t"
// 	"movl %%edx,%%ecx\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"je 2b\n\t"
// 	"decl %1\n\t"
// 	"cmpb $0,(%1)\n\t"
// 	"je 7f\n\t"
// 	"movl %1,%0\n"
// 	"3:\tlodsb\n\t"
// 	"testb %%al,%%al\n\t"
// 	"je 5f\n\t"
// 	"movl %4,%%edi\n\t"
// 	"movl %%edx,%%ecx\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"jne 3b\n\t"
// 	"decl %1\n\t"
// 	"cmpb $0,(%1)\n\t"
// 	"je 5f\n\t"
// 	"movb $0,(%1)\n\t"
// 	"incl %1\n\t"
// 	"jmp 6f\n"
// 	"5:\txorl %1,%1\n"
// 	"6:\tcmpb $0,(%0)\n\t"
// 	"jne 7f\n\t"
// 	"xorl %0,%0\n"
// 	"7:\ttestl %0,%0\n\t"
// 	"jne 8f\n\t"
// 	"movl %0,%1\n"
// 	"8:"
// 	:"=b" (__res),"=S" (___strtok)
// 	:"0" (___strtok),"1" (s),"g" (ct)
// 	:"ax","cx","dx","di");
// return __res;
// }

// extern inline void * memcpy(void * dest,const void * src, int n)
// {
// __asm__("cld\n\t"
// 	"rep\n\t"
// 	"movsb"
// 	::"c" (n),"S" (src),"D" (dest)
// 	:);
// return dest;
// }

// extern inline void * memmove(void * dest,const void * src, int n)
// {
// char * _tmp_src = (char*)src+n-1;
// char * _tmp_dst = (char*)dest+n-1;
// if (dest<src)
// __asm__("cld\n\t"
// 	"rep\n\t"
// 	"movsb"
// 	::"c" (n),"S" (src),"D" (dest)
// 	:);
// else
// // __asm__("std\n\t"
// // 	"rep\n\t"
// // 	"movsb"
// // 	::"c" (n),"S" (src+n-1),"D" (dest+n-1)
// // 	:"cx","si","di");
// __asm__("std\n\t"
// 	"rep\n\t"
// 	"movsb"
// 	::"c" (n),"S" (_tmp_src),"D" (_tmp_dst)
// 	:);
// return dest;
// }

// extern inline int memcmp(const void * cs,const void * ct,int count)
// {
// register int __res __asm__("ax");
// __asm__("cld\n\t"
// 	"repe\n\t"
// 	"cmpsb\n\t"
// 	"je 1f\n\t"
// 	"movl $1,%%eax\n\t"
// 	"jl 1f\n\t"
// 	"negl %%eax\n"
// 	"1:"
// 	:"=a" (__res):"0" (0),"D" (cs),"S" (ct),"c" (count)
// 	:);
// return __res;
// }

// extern inline void * memchr(const void * cs,char c,int count)
// {
// register void * __res __asm__("di");
// if (!count)
// 	return NULL;
// __asm__("cld\n\t"
// 	"repne\n\t"
// 	"scasb\n\t"
// 	"je 1f\n\t"
// 	"movl $1,%0\n"
// 	"1:\tdecl %0"
// 	:"=D" (__res):"a" (c),"D" (cs),"c" (count)
// 	:);
// return __res;
// }

// extern inline void * memset(void * s,char c,int count)
// {
// __asm__("cld\n\t"
// 	"rep\n\t"
// 	"stosb"
// 	::"a" (c),"D" (s),"c" (count)
// 	:);
// return s;
// }


extern char * strerror(int errno);

/*
 * This string-include defines all string functions as inline
 * functions. Use gcc -march=i386 -m32 . It also assumes ds=es=data space, this should be
 * normal. Most of the string-functions are rather heavily hand-optimized,
 * see especially strtok,strstr,str[c]spn. They should work, but are not
 * very easy to understand. Everything is done entirely within the register
 * set, making the functions fast and clean. String instructions have been
 * used through-out, making for "slightly" unclear code :-)
 *
 *		(C) 1991 Linus Torvalds
 */
 
extern  char * strcpy(char * dest,const char *src);

extern  char * strncpy(char * dest,const char *src,int count);

extern  char * strcat(char * dest,const char * src);

extern  char * strncat(char * dest,const char * src,int count);

extern  int strcmp(const char * cs,const char * ct);

extern  int strncmp(const char * cs,const char * ct,int count);

extern  char * strchr(const char * s,char c);

extern  char * strrchr(const char * s,char c);

extern  int strspn(const char * cs, const char * ct);

extern  int strcspn(const char * cs, const char * ct);

extern  char * strpbrk(const char * cs,const char * ct);

extern  char * strstr(const char * cs,const char * ct);

extern  int strlen(const char * s);

extern char * ___strtok;

extern  char * strtok(char * s,const char * ct);

extern  void * memcpy(void * dest,const void * src, int n);

extern  void * memmove(void * dest,const void * src, int n);

extern  int memcmp(const void * cs,const void * ct,int count);

extern  void * memchr(const void * cs,char c,int count);

extern  void * memset(void * s,char c,int count);

#endif
